About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys V: Mechanical Behavior
|
| Presentation Title |
Atomistic Tracking of Self Diffusivity in Multi-Principal Element Alloys |
| Author(s) |
Manisha Tripathy, Dylan Clay Miley, Jeremy K Mason, Gregory B Thompson |
| On-Site Speaker (Planned) |
Manisha Tripathy |
| Abstract Scope |
Short-range order (SRO) is implicated as a mechanism that gives rise to peculiar properties in multi-principal element alloys (MPEAs). The kinetics of this SRO phase formation depends on the self-diffusion of the various MPEA elements. In this work, we report how SRO in NiCoCr evolves as a function of thermal processing. Using atom probe tomography (APT), we track the diffusivity of the various species under conditions that either promote or decompose SRO. The spatial resolution uncertainties, such as trajectory aberrations and image compression factors on the reconstructed data sets, are assessed on the accuracy of SRO measurements. The APT datasets are then analyzed by a model for SRO determination based on an underlying pairwise-interaction Markov point process. Using this information, a description of the mutual atomic interactions of the SRO and its self-diffusivity is discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Entropy Alloys, |